P2C74Active Grille Air Shutter C Control Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2C74 judges the drive of grille shutter C: the command to the actuator or the feedback it returns does not fit the expected range, so the flap may move sluggishly, erratically or not at all. Hyundai is the documented user. In its 2026 Palisade and Palisade Hybrid (built May to December 2025) the lower air flap system has a left and a right actuator plus two flap sensors, and campaign 26-01-026H (revised as 26-01-026H-1 in August 2026) lists P2C74 with P05FE, P05AE and U0285. The cause there was water reaching the bumper connectors and corroding pins; the driver sees an air flap system message and the engine lamp, sometimes even a low oil warning. Repair means cleaning or replacing connectors, actuator, sensor or bumper harness. Unlike P2C73 (flap stuck open), this code points at the electrical drive path.
- What you may notice
- Engine warning lamp and an active air flap warning message
- Flap does not move or moves jerkily
- Possibly an unrelated low engine oil message at the same time
- Likely causes
- LikelyWater ingress and corroded pins at the bumper connectors of the flap actuator or sensor
- PossibleChafed or broken front bumper harness
- PossibleActuator of shutter C faulty or responding too slowly
- RareFlap position sensor of the lower air flap faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.